Answer:
xy is equal to 15 Q understood
Answer:
Part 1) Option D 
Part 2) Option C 
Step-by-step explanation:
we know that
In a Rhombus
Opposite angles are congruent, and consecutive angles are supplementary. All sides are congruent by definition. The diagonals bisect the angles
Part 1) What is the measure of angle
?
-----> remember that the diagonals bisect the angles
Part 2) What is the measure of angle
?
Remember that
In a rhombus consecutive angles are supplementary
so
The measure of angle
is equal to the measure of angle T divided by 
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Ok so to find this we need to find 25% of 8 and then add that number to 8 itself. SO .25*8=2. So 2+8=10. So the answer is 10. IF you don't get it just ask and i can try to re explain